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本试验研究了连作胁迫条件下，硒在减轻连作胁迫对大豆膜脂过氧化损伤中的作用。结果表明，在重茬盆栽和迎茬小区试验中，硒的施用显著提高了大豆叶片中谷胱甘肽过氧化物酶（ Ｇ Ｓ Ｈ－ Ｐｘ）的活性，方差分析结果分别为 Ｆ＝１３．００和 Ｆ＝ ５．１２。由于 Ｇ Ｓ Ｈ－ Ｐｘ 活性的提高，使大豆叶片中膜脂过氧化产物丙二醛（ Ｍ Ｄ Ａ）的含量明显降低，二者呈极显著负相关，相关系数分别为ｒ＝－ ０．９６７和ｒ＝ － ０．６９１；在重茬盆栽试验中，硒处理明显地提高大豆对红蜘蛛的抗性，使产量较对照增加９３．２％ ～１１２．７％ ， Ｆ＝ ２６．５５。在迎茬小区试验中，硒处理使大豆产量提高１２．９６％ ～１４．５３％ ，但方差分析未达到显著水平。
The present study investigated the effect of selenium on reducing membrane lipid peroxidation injury induced by continuous cropping under continuous cropping stress. The results showed that the selenium application significantly increased the activity of glutathione peroxidase (GSH-Px) in soybean leaves during repeated cropping and cucumber harvesting experiments. The ANOVA results were F = 13.00 and F = 5.12. Due to the increase of GSH-Px activity, the content of membrane lipid peroxidation product malondialdehyde (M D A) in soybean leaves decreased significantly, the two showed a very significant negative correlation, the correlation coefficients were r = - 0.967 and r = - 0.691. Selenium treatment significantly increased the resistance of soybean to Spider mite in the repeated cropping experiment, which increased the yield by 93.2% ~ 112.7% compared with the control, F = 26. 55. During the plot trial of seeding crop, selenium treatment increased the yield of soybean by 12.96% ~ 14.53%, but the variance analysis did not reach the significant level.